grumphp version used is not compatible with PHP 8

[ptmkenny]

I tried to update to Drupal 9.3 with PHP 8 this morning and got blocked because the version of grumphp used here does not support PHP 8+.

[lagates]

It also looks like:

sebastian/finder-facade and sebastian/phpcpd also need to be updated for PHP 8

[lagates]

created #37 to update versions

[malcomio]

It looks like this was downgraded to support PHP <= 7 in this commit:
9c6d103

[malcomio]

I've created #38, which seems to work locally - @lagates what was the reason you closed #37?